Plants vs Zombies
My wife sent me a link to this game after a conversation I started when we were planning out landscaping for our yard (I wanted a defensive perimeter capable of holding back the zombie hordes). I’ve been debating on buying this game after playing the free trial. It has "lost time" potential though where you just start playing and hours of your day disappear. Not always the best thing for a writer (but the hour I played of it was fun).